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Detail
Journal Article
Transceiver for Human Body Communication Using Frequency Selective Digital Transmission
- Authors
- Chang-Hee Hyoung, Sung-Weon Kang, Seong-Ook Park, Youn-Tae Kim
- Issue Date
- 2012-04
- Citation
- ETRI Journal, v.34, no.2, pp.216-225
- ISSN
- 1225-6463
- Publisher
- 한국전자통신연구원 (ETRI)
- Language
- English
- Type
- Journal Article
- Abstract
- This paper presents a transceiver module for human body communications whereby a spread signal with a group of 64 Walsh codes is directly transferred through a human body at a chip rate of 32 Mcps. Frequency selective digital transmission moves the signal spectrum over 5 MHz without continuous frequency modulation and increases the immunity to induced interference by the processing gain. A simple receiver structure with no additional analog circuitry for the transmitter has been developed and has a sensitivity of 250 μV pp. The high sensitivity of the receiver makes it possible to communicate between mobile devices using a human body as the transmission medium. It enables half-duplex communication of 2 Mbps within an operating range of up to 170 cm between the ultra-mobile PCs held between fingertips of each hand with a packet error rate of lower than 10 -6. The transceiver module consumes 59 mA with a 3.3 V power supply. © 2012 ETRI.
- KSP Keywords
- 3 V, Frequency-modulation(FM), Half-Duplex(HD), Half-duplex communication, High Sensitivity, Human Body Communication(HBC), Mobile devices, Operating range, Packet error rate, Processing gain, Receiver Structure